broach (v.)youdaoicibaDictYouDict
"pierce," early 14c., from the same source as broach (n.). Meaning "begin to talk about" is 1570s, a figurative use with suggestions of "broaching" a cask or of spurring into action (compare Old French brochier, 12c., "to spur," also "to penetrate sexually"). Related: Broached broaching.
purr (v.)youdaoicibaDictYouDict
1610s, of imitative origin. Related: Purred; purring. As a noun from c. 1600.
spur (v.)youdaoicibaDictYouDict
c. 1200, from spur (n.). Figurative use from c. 1500. Related: Spurred; spurring. Old English had spyrian, but it meant "follow the track of, track down, investigate."